Factoring Expressions
ISEE Upper Level · Flashcards · Recall
ISEE UPPER LEVEL · FLASHCARDS
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QUESTION
State the identity for factoring a difference of squares.
QUESTION
State the identity for factoring a difference of cubes.
QUESTION
State the identity for factoring a sum of cubes.
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ANSWER
a
3
+
b
3
=
(
a
+
b
)
(
a
2
−
a
b
+
b
2
)
a^3+b^3=(a+b)(a^2-ab+b^2)
a
3
+
b
3
=
(
a
+
b
)
(
a
2
−
ab
+
b
2
)
. The sum of cubes identity factors
a
3
+
b
3
a^3 + b^3
a
3
+
b
3
into
(
a
+
b
)
(
a
2
−
a
b
+
b
2
)
(a + b)(a^2 - ab + b^2)
(
a
+
b
)
(
a
2
−
ab
+
b
2
)
.
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